Smoke-consuming furnace.



PATRICK RIELLY, OF NEWARK, NEW JERSEY.

SMOKE-CONSUMING FURNACE.

Specification of Letters Patent.

Patentes April 7, 1908.

Application led `Tanuary 25, 1907. Serial No. 353,942. I

.T ofaZZ z/:zom it may concern:

Be it known that I, PATRICK RIELLY, 'a citizen oftheUnited States, residing at N ewark, in the count-y of Essex-and State of New Jersey, haveinvented certain new and useful Improvements in Smoke-Consuming Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this speciiication.

The object of this invention is to provide a device to secure more efficiency from the furnace of a boiler, or similar structure, and is .designed to provide a means for making a more perfect -combustion of the gasesthat come from the fire, and the particular construction herein illustrated and described, re-

fers to the bridg'e wall in a furnace that is supplied, from the outside, by means of a sultable pipe passing through the combus-f tion chamber, this pipe carrying air and feeding the inside lof the bridge Wall, which is hollow, and tending also to heat the gas.

The invention further consists in designing the top of the bridge wall so as to feed the larger part of the air, fed into the bridge wall, forward into the fire box, and to take a small portion of the air coming in and feed it through a series of muchl smaller erforations in the-bridge wall back into t e combustion chamber.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a section of a furnace showing the boiler in elevation. F ig. 2 isa section on line 2, 2, in Fig. 1.

Any suitable boiler or medium to be heated can be used, but I illustrate a tube boiler 10, and on the front thereof is a suitable wall 11 on which are installed the usual ash-pit and furnace doors, and the back of the furnace issinclose'd by a wall 12, customary side walls of course, being also installed. The grate 13 is secured, on one end, to the bridge wall, and on the other end to thefront Wall 11, m the manner now employed, and between this grate and the boiler is the fire box 14. The bridge wall 15 is of a peculiar construction, and embodies a space 16 running across the Width of thefurnace and having, on its top edge, a covering 17 which is usually box.4 By making comparatively large, and on the back of the bridge wall and7 leading the other way into the combustion chamber, are the perforations 19 which are smaller than the erforations 18, lthe purposes of which wil be described hereinafter. The space 16, in the bridge wall, and consequently the perforations, in the bridge wall, are sup lied by means of a pipe 20 which is arranged to pass back'through the combustion chamber, and thus be constantly heated to a considerable degree, and a suitable valve or closure 21 can be placed on the end of the pipe to regulate the admission of air. 1

The device, when it operates, tends to feed air in through the pipe 20, the space 16, and out of the perforatlons 18, thus throwing most ofthe air entering into the iire box 14, directly over the i're, and thus supplying the necessary elements to com lete, to a great extent, the combustion cip gases. At the same time a small portion 'of the air passes out through the perforations 19 and cornpletes in the combustion chamber 'by minglingwith the unconsumed gases that. have passed over the bridge wall, a still further consumption of gas, and it is thought, in this way, that almost all the gases coming from the coal can be consumed before passing into the iue of the chimney.

This device is designed to beused in lessening the amount of smoke coming from a chimney, thus making it possible to use soft coal and not to injure the public health, and also gives the user ofthe coal more benefit of his fuel. The particular arrangement of perforations is emphasized, andtheir sizes are also s eciiied because if the perforations, throug the bridge wall, were of about the same'size, there would be no mixture in the fire box and very little in the combustion chamber, as theforce of the draft from the fire would simply force some of the products of combustion through the perforations in the bridge wall, andthe only mixture would be in the combustion chamber, and itwould be impossible to get any1 of the air into the iire the perforations in the rear of the bridge wall smaller, the iiow in thatdirection 'is retarded,=and the balance of the -air is forced forward into thefire box be used np therein, after it combines with `the Wa11, a fireV box on the front of the bridge Wall, the bridge Wall forming a combustion chamber with the rear walls of the inclosing lWalls', vthe bridge Wall having a Chamber therein and having perforations in its front wall above' the grate and arranged to be above the ire, the perforations being of almost the 'capacity of the chamber in the bridge wall, whereby most of the -air therefrom will pass into the fire box, the bridge Wall also-having a series of peforations rnuehI smaller than .the erforatlons in the' front thereof, the srna er perforations leading combustion chamber, the' erforations in the front and back of the bri ge Wall being arranged out' ofalinement so as to destroy any tendency of the draft from the fire to ass through the bridge Wall, the `current 0i? air 'through the `back of the bridge Wai-1 into the v being thus induced from the Chamber in the bridge wall 'through the front perforationsv by the draft of the fire alone7 the chamber in the bridge Wa11.having no :other connection throughthe front of the bridge Wall, anda pipe leading into the chamber of the bridge wall andI passing through the combustion ehainber,l whereby it is heated.

`In testimony that -claim the `foregoing have hereunto set my hand this 24th day of January, 1907,

' PATRICK RIELLY. Witnesses:

WM. H. CAMFIELD, E. A. PELL. 

